/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.

This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").

Contact information
-------------------

Circuits At Home, LTD
Web      :  http://www.circuitsathome.com
e-mail   :  support@circuitsathome.com
*/
#if !defined(__CDCPROLIFIC_H__)
#define __CDCPROLIFIC_H__

#include <inttypes.h>
#include <avr/pgmspace.h>
#include "avrpins.h"
#include "max3421e.h"
#include "usbhost.h"
#include "usb_ch9.h"
#include "Usb.h"

#if defined(ARDUINO) && ARDUINO >=100
#include "Arduino.h"
#else
#include <WProgram.h>
#endif

#include "printhex.h"
#include "hexdump.h"
#include "message.h"

#include "confdescparser.h"
#include "cdcacm.h"

//#define PL2303_COMPAT //uncomment it if you have compatibility problems

#define PL_VID									0x067B
#define PL_PID									( 0x2303 || 0x0609 )

#define PROLIFIC_REV_H							0x0202
#define PROLIFIC_REV_X							0x0300
#define PROLIFIC_REV_HX_CHIP_D					0x0400
#define PROLIFIC_REV_1							0x0001

#define kXOnChar  '\x11'
#define kXOffChar '\x13'
						                       
#define SPECIAL_SHIFT       (5)
#define SPECIAL_MASK        ((1<<SPECIAL_SHIFT) - 1)
#define STATE_ALL           ( PD_RS232_S_MASK | PD_S_MASK )
#define FLOW_RX_AUTO        ( PD_RS232_A_RFR | PD_RS232_A_DTR | PD_RS232_A_RXO )
#define FLOW_TX_AUTO        ( PD_RS232_A_CTS | PD_RS232_A_DSR | PD_RS232_A_TXO | PD_RS232_A_DCD )
#define CAN_BE_AUTO         ( FLOW_RX_AUTO | FLOW_TX_AUTO )
#define CAN_NOTIFY          ( PD_RS232_N_MASK )
#define EXTERNAL_MASK       ( PD_S_MASK | (PD_RS232_S_MASK & ~PD_RS232_S_LOOP) )
#define INTERNAL_DELAY      ( PD_RS232_S_LOOP )
#define DEFAULT_AUTO        ( PD_RS232_A_DTR | PD_RS232_A_RFR | PD_RS232_A_CTS | PD_RS232_A_DSR )
#define DEFAULT_NOTIFY      0x00
#define DEFAULT_STATE       ( PD_S_TX_ENABLE | PD_S_RX_ENABLE | PD_RS232_A_TXO | PD_RS232_A_RXO )

#define	CONTINUE_SEND							1
#define	PAUSE_SEND								2

#define kRxAutoFlow	((UInt32)( PD_RS232_A_RFR | PD_RS232_A_DTR | PD_RS232_A_RXO ))
#define kTxAutoFlow	((UInt32)( PD_RS232_A_CTS | PD_RS232_A_DSR | PD_RS232_A_TXO | PD_RS232_A_DCD ))
#define kControl_StateMask	((UInt32)( PD_RS232_S_CTS | PD_RS232_S_DSR | PD_RS232_S_CAR | PD_RS232_S_RI  ))
#define kRxQueueState ((UInt32)( PD_S_RXQ_EMPTY | PD_S_RXQ_LOW_WATER | PD_S_RXQ_HIGH_WATER | PD_S_RXQ_FULL ))
#define kTxQueueState ((UInt32)( PD_S_TXQ_EMPTY | PD_S_TXQ_LOW_WATER | PD_S_TXQ_HIGH_WATER | PD_S_TXQ_FULL ))

#define kCONTROL_DTR							0x01
#define kCONTROL_RTS							0x02


enum tXO_State 
{
    kXOnSent = -2,
    kXOffSent = -1,
    kXO_Idle = 0,
    kXOffNeeded = 1,
    kXOnNeeded = 2
} ;

#define kStateTransientMask						0x74
#define kBreakError								0x04
#define kFrameError								0x10
#define kParityError							0x20
#define kOverrunError							0x40

#define kCTS									0x80
#define kDSR									0x02
#define kRI										0x08
#define kDCD									0x01
#define kHandshakeInMask	((UInt32)( PD_RS232_S_CTS | PD_RS232_S_DSR | PD_RS232_S_CAR | PD_RS232_S_RI  )) 

#define VENDOR_WRITE_REQUEST_TYPE				0x40
#define VENDOR_WRITE_REQUEST					0x01

#define VENDOR_READ_REQUEST_TYPE				0xc0
#define VENDOR_READ_REQUEST						0x01

// Device Configuration Registers (DCR0, DCR1, DCR2)
#define SET_DCR0                                0x00
#define GET_DCR0                                0x80
#define DCR0_INIT                               0x01
#define DCR0_INIT_H                             0x41
#define DCR0_INIT_X                             0x61

#define SET_DCR1                                0x01
#define GET_DCR1                                0x81
#define DCR1_INIT_H                             0x80
#define DCR1_INIT_X                             0x00

#define SET_DCR2                                0x02
#define GET_DCR2                                0x82
#define DCR2_INIT_H                             0x24
#define DCR2_INIT_X                             0x44
 
// On-chip Data Buffers:
#define RESET_DOWNSTREAM_DATA_PIPE              0x08
#define RESET_UPSTREAM_DATA_PIPE                0x09

enum pl2303_type 
{
	unknown,
	type_0,
	type_1,		/* don't know the difference between type 0 and */
	rev_X,		/* type 1, until someone from prolific tells us... */
	rev_HX,		/* HX version of the pl2303 chip */
	rev_H
};
 

#define PL_MAX_ENDPOINTS					4

//class PL2303;

class PL2303 : public ACM
{
    
	//uint16_t	wPLType;				// Type of chip
  

public:
	PL2303(USB *pusb, CDCAsyncOper *pasync);

	// USBDeviceConfig implementation
	virtual uint8_t Init(uint8_t parent, uint8_t port, bool lowspeed);
	//virtual uint8_t Release();
	//virtual uint8_t Poll();
	//virtual uint8_t GetAddress() { return bAddress; };

	//// UsbConfigXtracter implementation
	//virtual void EndpointXtract(uint8_t conf, uint8_t iface, uint8_t alt, uint8_t proto, const USB_ENDPOINT_DESCRIPTOR *ep);

private:
    /* Prolific proprietary requests */
    uint8_t vendorRead( uint8_t val_lo, uint8_t val_hi, uint16_t index, uint8_t* buf );
    uint8_t vendorWrite( uint8_t val_lo, uint8_t val_hi, uint8_t index );  
};

/* vendor read request */
inline uint8_t PL2303::vendorRead( uint8_t val_lo, uint8_t val_hi, uint16_t index, uint8_t* buf )
{
  return( pUsb->ctrlReq(bAddress, 0, VENDOR_READ_REQUEST_TYPE, VENDOR_READ_REQUEST, val_lo, val_hi, index, 1, 1, buf, NULL ));
}

/* vendor write request */
inline uint8_t PL2303::vendorWrite( uint8_t val_lo, uint8_t val_hi, uint8_t index )
{
  return( pUsb->ctrlReq(bAddress, 0, VENDOR_WRITE_REQUEST_TYPE, VENDOR_WRITE_REQUEST, val_lo, val_hi, index, 0, 0, NULL, NULL ));
}

#endif // __CDCPROLIFIC_H__